diff --git a/pyproject.toml b/pyproject.toml
index ec2f1ac..10ad86c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "FSRS-Optimizer"
-version = "5.5.0"
+version = "5.6.0"
 readme = "README.md"
 dependencies = [
     "matplotlib>=3.7.0",